Blue Light


Think about the first thing that you do in the morning. Perhaps you’re catching up on email before you even get out of bed. Then, you head straight to your computer at work and spend a majority of the day on it or using one of the many other digital devices that are available in today’s increasingly-technological society. These electronics are emitting a dangerous blue light, which is negatively impacting not only your vision but also your overall health? Continual extended screen time can impact your eyes in two major ways. The first and most common side effect is digital eye strain. When we look at a screen, our blink rate drops significantly, and our eyes won’t put up with that for too long without fuss. 

If you’ve ever experienced slightly blurry vision after staring at the computer all day, that was a sign of digital eye strain. Maybe your eyes feel dry, runny or tired after scrolling through your Facebook feed, or maybe you get a headache after a few hours on the computer. These symptoms are often so common that we don’t even recognize them as real issues. While digital eye strain is temporary, if left unaddressed, it can turn into a chronic problem.

The easiest way to address digital eye strain is to blink more. That might sound overly simple, but blinking helps to keep eyes lubricated. Another effective way to avoid or help to resolve digital eye strain is to follow the “20-20-20 Rule” — every 20 minutes, stare at something at least 20 feet away for at least 20 seconds. This exercise engages your distance vision and helps the eye to “reset.”

The second — and more serious — impact that too much technology consumption can have on our eyes is damage from blue light exposure. Blue light is just what it sounds like — it’s a type of light that gives off a blue color. Blue light is harmful, because it’s the highest energy wavelength of visible light. This energy is also able to penetrate all the way to the back of the eye, through the eyes’ natural filters, and that’s the problem.

Even though blue light is nothing new, the biggest issue is the amount of blue light exposure that we get each day through digital device use. With this exposure increasing over time, we are actually causing permanent damage to our eyes. But unlike digital eye strain, the effects of blue light are cumulative and can lead to eye diseases like macular degeneration.

Children are especially at risk when it comes to the negative effects of blue light exposure. These days, a lot of homework is done online, and many children have access to (or have their own) digital devices that they are using for increasingly longer periods of time. The difference for children is that their eyes are still developing, and they don’t yet have the protective pigments in their eyes to help filter out some of this harmful blue light. That’s why, just like with UV radiation, most blue light exposure occurs before kids are 18 years old.

While it may be a great concern for children, adults are susceptible, as well. This is especially true as adults are using digital devices more and more in both their personal and professional lives. So what can you do about it?

First, you can take steps to protect your eyes from the harmful effects of blue light. If you’re not able to limit your digital device use, at least cut back on it before bed. Studies show that exposure to blue light a couple of hours before bedtime actually suppresses melatonin and delays deep REM sleep problems. So cutting back on tech use at night means getting better sleep, making people more productive at both work and school (and speaking from my own personal experience, it makes children more pleasant).

Second, you should consider talking with your eye doctor about lenses that filter out blue light (and no, these aren’t the old bright orange blue-blocker eyewear from the ‘90s). The lenses have little-to-no tint and can help to minimize the direct blue light exposure that you get throughout the day. Most of my patients who have these lenses noticed an immediate increase in eye comfort because of the improved contrast, which helps to relax the eyes. And if you have children, I would absolutely recommend these lenses — especially if they have trouble sleeping at night.

By keeping in mind a few simple ways to protect the eyes, we can take pleasure in knowing that our eyes will last much longer than our trusty smartphones, tablets and computers.

Scratch Resistant Coating

No eyeglass lenses not even glass lenses, are scratch-proof.

At Cristall Opticians we offer lenses that are treated front and back with a clear, scratch-resistant coating. This coating makes the lense have a much harder surface that is more resistant to scratching. Most scratches develop from dropping your glasses or cleaning them with a paper towel.

Kids' lenses, especially, benefit from a scratch-resistant hard coat for greater durability

Since scratch-resistant coatings are sometimes optional, make sure you ask about our ask to receive it on your glasses. To keep your glasses looking brand new, proper storage is necessity. Make sure you store them in a case when not in use, and remember to clean your lenses with a microfiber cloth.


Anti Reflective Coating

Anti-reflective coating (also called AR coating or ) is a microscopically thin multilayer coating that eliminates reflections from the front and back surface of eyeglass lenses.

AR coating makes your lenses nearly invisible so people can focus on your eyes, not distracting reflections from your eyeglasses.

Anti-reflective coating also eliminates glare caused by light reflecting from your lenses. With reflections eliminated, lenses with AR coating provide better vision for night driving and more comfortable vision for reading and computer use.

AR coating is highly recommended for all eyeglass lenses, but particularly for polycarbonate and high-index lenses, which reflect more light than regular glass or plastic lenses if anti-reflective coating is not applied. 

At Cristall Opticians we value eye health just as much as looking good in your new glasses. We strongly recommend the AR coating which is of the highest quality to experience the best degree in eye comfort and health as you adjust to your new glasses.


UV Coating

UV or Ultra Violet coatings protect your eyes from constant exposure to Ultraviolet light. Most commonly people get this light from the sun. Similar to sunscreen and how it protects your skin. The coating keeps the sun's UV rays from harming your eyes.

UV rays are involved in the development of cataracts, eye-surface problems like pterygia and pingueculae, and macular degeneration. Protecting lenses with a UV coating can reduce your risk of developing one of these problems.

At Cristall Opticians we offer a UV coating that will protect your eyes from the constant UV exposure that you experience every day.